Question

12. निम्नलिखित प्रश्नों में से किसी एक प्रश्न का उत्तर लगभग 40-60 शब्दों में दीजिए। Answer any one of the following questions in about 40 to 60 words. (a) एक तत्व की संयोजकता 3. (पाठ 6 देखें An element X has a valency 3+ (See lesson 6 (i) इसके फोसफाइड का सूत्र लिखिए Write the formula of its phosphide (ii) इसके कार्बोनेट का सूत्र लिखिए Write the formula of the curbonate (iii) इसके नाइट्रेट का सूत्र लिखिए Write the fomula of its nitrate (iv) इसके बोरेट का सूत्र लिखिए Write the formula of its Borates (b) 0.5 मोल जल में उपस्थित अणुओं की संख्या को परिकलित कीजिए।​

Answer 1

Borax, also known as sodium borate, sodium borate decahydrate or sodium tetraborate decahydrate, is a hydrate salt of boric acid.[1] Commonly available in powder or granular form, it dissolves in water to make a basic, aqueous solution.[1] It is soluble and has many industrial and household applications as a component in a wide range of products.

formula :- Na2B4O7• 10H2O

Answer 2

Answer:

Write the formula of phosphide